<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartInfoList" :key="cart.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :Checked="cart.isChecked == 1" @change="checkCart(cart)">
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl">
            <div class="item-msg">{{cart.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{cart.skuPrice}}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="handle(value='mins',cart)">-</a>
            <input autocomplete="off" type="text" :value="cart.skuNum" minnum="1" class="itxt"
              @change="handle(value='itxt',cart)">
            <a href="javascript:void(0)" class="plus" @click="handle(value='plus',cart)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{cart.skuPrice*cart.skuNum}}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="delCart(cart)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isAllChecked" @change="checkAll">
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="delAllCheckedCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{checkedCart}}</span>件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalPrice}}元</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { reqAddToCart, reqDelCart, reqCheckCart } from '@/api'
import { mapGetters } from 'vuex'
import throttle from "lodash/throttle";
export default {
  name: 'ShopCart',
  mounted() {
    this.getData()
  },
  methods: {
    getData() {
      this.$store.dispatch('toShopCart')
    },
    handle: throttle(async function (value, cart) {
      switch (value) {
        case 'plus':
          // console.log('商品的数量加一');
          await reqAddToCart(cart.skuId, 1)
          this.getData()
          break
        case 'mins':
          if (cart.skuNum <= 1) {
          } else {
            await reqAddToCart(cart.skuId, -1)
            this.getData()
          }
          break
        case 'itxt':
          // console.log(parseInt(event.target.value));
          if (!isNaN(event.target.value * 1) && event.target.value * 1 > 0) {
            await reqAddToCart(cart.skuId, parseInt(event.target.value) - cart.skuNum)
          }
          this.getData()
          break
      }
    }, 600),

    async delCart(cart) {
      if (confirm('确定删除吗？')) {
        await reqDelCart(cart.skuId)
        this.getData()
      }
    },
    async checkCart(cart) {
      await reqCheckCart(cart.skuId, cart.isChecked == 1 ? 0 : 1)
      this.getData()
    },
    delAllCheckedCart() {
      if (confirm('确认删除全部商品吗？')) {
        let num = 0
        this.cartInfoList.reduce(async(old, cur) => {
          if (cur.isChecked == 1) {
            num++
            await reqDelCart(cur.skuId)
            this.getData()
          }
        },0)
        if(num == 0) return alert('没有勾选需要删除的商品！')
      }
    },
    checkAll(){
      if(!event.target.checked){
        this.cartInfoList.reduce(async (old,cur)=>{
          await reqCheckCart(cur.skuId,0)
          this.getData()
        },0)
      }else{
        this.cartInfoList.reduce(async (old,cur)=>{
          await reqCheckCart(cur.skuId,1)
          this.getData()
        },0)
      }
    }
  },
  computed: {
    ...mapGetters(['cartInfoList']),
    //计算一共选择了多少件商品
    checkedCart() {
      return this.cartInfoList.reduce((old, cur) => {
        // console.log(cur.isChecked,"---");
        return old + cur.isChecked
      }, 0)
    },
    //计算选择的商品总价
    totalPrice() {
      return this.cartInfoList.reduce((old, cur) => {
        if (cur.isChecked != 1) {
          return old
        }
        return old + cur.skuPrice * cur.skuNum
      }, 0)
    },
    isAllChecked() {
      if(this.cartInfoList.length == 0){
        return false
      }
      return this.cartInfoList.every((item) => item.isChecked == 1)
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      &>div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;

      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        &>li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        /* .cart-list-con3 {
            width: 20.8333%;

            .item-txt {
              text-align: center;
            }
          } */

        .cart-list-con4 {
          width: 10%;

        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>